Twin standards simultaneously adjusted.



No. 796,815 PATENTED AUG. 8, 1905.

F. W. GOY. TWIN STANDARDS SIMULTANEOUSLY ADJUSTED.

APPLICATION FILED JULY 25, 1904.

W292 33cc fiw WA ulnuw. I. swam co. PNOIO-UYNOGRAFNERS. wAsnZna'mn, 5 c1UNITED STATES PATENT OFFICE.

FREDERICK W. GOY, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO CHARLES F.BROWN, TRUSTEE, OF READING, MASSACHUSETTS.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed July 25,1904:- Serial No. 217,932.

To aZZ whom, it may concern.-

Be it known that I, FREDERICK W. (101, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Twin Standards Simultaneously Adjusted, of which the following is a specification.

This invention relates to means for adjustably supporting a bench, seat,table, or other structure at a plurality of points and adjusting theseveral supporting members simultaneously to vary the height of thething supported without tipping or inclining it.

The invention has for its object to provide simple and effective meansfor simultaneously adjusting or changing the position of an articlesupported at a plurality of points; and it consists in the improvementswhich I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification,Figure 1 represents a side elevation of an elongated piano-stool orduet-bench embodying my invention. Fig. 2 represents a section on line 22 of Fig. 1. Fig. 3 represents a section on line 3 3 of Fig. 2.

The same reference characters indicate the same parts in all thefigures.

In the drawings, a represents an elongated body, such as the seat of aduet-bench.

b I) represent screw-threaded standards or standard members affixed tothe bench a and projecting downwardly therefrom.

c 0 represent rotary standard members formed as nuts engaging thethreads of the members I) b, and d d represent base standard members,which are formed to support the rotary members 0 c and to receive thelower portions of the members I) b. The base members are provided withsuitable supporting-legs e and are connected by a bar or strut f.

f is a casing which incloses the rotary members 0 and the chainhereinafter referred to.

The rotary members 0 are provided with sprocket-teeth 0, each member 0constituting a sprocket-wheel as well as a nut. h represents asprocket-chain engaged with and.

connecting the members 0 c and causing said members to rotate 1n unisonwhen power is applied to either of said members or to the" Each set ofmembers I) c d constitu es an 7 adjustable standard, which forms a partof a supporting structure, the two standards being connected, so thatthey are necessarily adjusted in unison. The base members havdependingchambered portions (1, which receive and conceal the lower portlons ofthe threaded members I), so that the supporting structure has a neat andfinished appearance.

Power may be applied to the chain by means of a driving sprocket-wheeli, which is supported between the two ad ustable standards and isaffixed to a vertical shaft 7. Said shaft has a bevel-gear 7c, meshing wth a bevel-gear m on a horizontal shaft n, which is provided with ahand-wheel 0, located within reach of a person sitting on the bench.Provision is thus made for applying power to the chain at the centralportion of the bench.

I do not limit myself to the application of the described invention to aduet-bench. A supporting structure embodying my invention and comprisinga plurality of standards, each including a base member, a rotary memberformed as a nut, and a non-rotary screw-threaded member engaged withsaid nut, together with suitable means for simultaneously rotating saidrotary members, may be employed for any purpose to which it s applicablewithout departing from the spirit of my invention.

It will be observed that the intermediate sprocket-wheel i is so locatedin the casing f as to deflect the chain and keep it under suitabletension so as to be engaged by said sprocket i. The casing f is eongated, and the two sprockets c c are at the ends thereof, and thesprocket L is substantially at the center of the casing and practicallyin a stralght line with the sprockets c c. The chain, however, is not soarranged that the sprocket i would be between its two stretches, thechain being deflected and the sprocket "L en gaging it at the outer sideof one stretch thereof. Hence the chain is kept under tension, as abovedescribed. Furthermore, it is to be noted that the means for varying theheight of the body a is located substantially at the center of thesupporting structure, so that the hand-wheel 0 is located in reach ofeither of two persons who may be sitting upon the body A.

I claim A duet-bench comprising a structure hav-' ing two standard basemembers having a casing supported by their upper ends, two rotaryinternally-threaded members supported by said casing and havingsprockets at their upper ends, a seat, two non-rotary externallythreadedmembers affixed to the seat and engaged with said rotary members, asprocketchain engaged with the sprockets of said rotary members, anintermediate sprocket in said casing and located substantially on a s rght line connecting the sprockets of said rotary threaded members andengaging the outer side of one stretch of the chain, and a hand-wheelmounted at a point substantially centrally of the bench and havingconnec tions with the intermediate sprocket to opcrate the latter.

In testimony whereof I have afiixed my signature in presence of twowitnesses.

FREDERICK W. COY.

Witnesses:

C. F. BROWN, E. BATCHELDER.

